Improvement in trunk-locks



.TO ALL WHOM IT MAY OONCERN:

@einen gisten getest @fitta ANILS NARD, OF HAVRE i DE GRACE, MARYLAND;

Letters Patent l-Vo. 69,115, dated September 24, 1867. i

IMPROVEMENT IN TRUNK-LOGKS.

Be it known that L'NILS NARD, of Havre dc Grace, in Harford county, andState of Maryland, have invented a new and useful improvement in Locksfor Doors, Chests, Lc.; and I do herehydeclare that the following is afull, clear, and exact description thereof, reference being had to theaccompanying ,dra-wing,

through letters of reference marked thereon, forming part of thisspecification, in which- Figure l represents a front view of the lock,the face-plate of the casing being removed, and the plate to which thebolts are attached being shown in red outline. I

Figure 2 is an inside or inverted view of the face-plate; and

Figure 3 is a detached View of the staples of a chest-lock as hererepresented.

My invention has reference mainly to that class of locks known asnight-latches, spring trunk-locks, orv

the like, but with slight modifications may be applied to every kind oflook; andit consists in the interposition of a pivoted attachment to thebolt or bolt-plate, through the medium of which the key operates on thevbolt instead of upon the bolt itself, as in the ordinary lock; also inthe combination with said intermediate piece of a spring-catch forretaining it in position out of reach of the key.

To enable others skilled in the art to make'and use myinvention, I willdescribe its construction and operation by referring to the drawings,'in whicli-v i I A represents the easing of the lock, which may beconstructed of any form suitable for the purpose for which the lock isintended to be used, a chest-lock being the character represented in thedrawing. Within this case is fitted a plate, B, which carries, and -towhich are firmlyattached the bolts C. This plate has a sliding motionlongitudinally, in which it is guided and stayed at either end by theT-shaped guides D, and is pressed forward into its locked position bythe spring E at its rear. To the inner side of the plate Bis rrnlyattached a pivot, c, on which is supported the intermediate vibratingdog or piece, c, through which the key operates to retract the bolt.This piece c is ot' peculiar formation, being somewhat of a Tform, witha lower and two lateral limbs, and is controlled by a spring, F,attached at c to the inner side of the plate B. The extension d of thisspring is of similar conformation on its under sido to that ofthe uppervside of the piece c, or thc lateral limbs thereof. A spring-plate, G,represented in dotted lines, of a curve-d or any convenient form, isattached to the rear 'outside of the casing by a screw or rivet at f,and at its opposite end is held in position by a stud or screw, g, thehead of which serves to limit its motion, and to this spring is attachedthe stem h, over which the pipe of the key fits, and also a stub orcatch, m, which serves to retain the piece c in its position out ofreach of the key The spring Z, .attached by a rivet or screw, 92., tothe inside of the face-plate, bears by its two ends on the bolt-plate B,and serves to keep it in place on its guides D. Surrounding the keystem7L, I arrange a series of springs, ic, attached at their ono end to theinner side of thev easing A or its face-plate, whilst their other endsare free, and arranged at such distance from the key-stem that inturning the key they will be struck by it and caused to vibrate, wherebysound similar to that of a bell is produced to give alarm, and indicatean attempt to open the chest or door.

Having thus described the several parts of my lock, its operation willbe as follows: The several parts of the lock being in the positionrepresented in iig. 1, the key may be inserted and turned in eitherdirection, and no other effect will be produced than the striking of thesprings le, and producing sound therefrom to create an alarm. In orderto operate the lock it is necessary first to depress the spring G bypressure on the end of the Ystern z, which will cause the stub or catchn attached to said spring to recede and liberate the piece c, allowingit to fall into the posit-ion represented by red lines at o', in whichposition, if the key vis inserted and turned to the right, said piece cwill vbe thrown hack to its original position, and no effect producedupon the bolt; and if said key is turned to the left, the piecc c willyield and allow it to pass, also without having any effect upon thebolt. But in order to operate the bolt, the piece c, being liberatedfrom thc catch m, and assuming the position represented at c', Aasbefore described, the key must be inserted and turned to the left untilthe ongle 1' of the concave end of the lower limb of the piece c isallowed to pass the nose ofthe key, when its further motion will bearrested by the angle s of thc lower limb of said piece e coming inContact with the said nose of the key in the position represented inblue lines c. When this position is attained, which is easily done by aperson who understands the operation of the lock, the key is to beturned to the right, when the bo1t-piate B will belfoi'oed boek, by thekey bearing against Athe lower limb of che 'piece o, into the positionrepresented in dotted red line-s :Lt 0', when'the bolts will bewithdrawn from the staples or the mortise, as the case may' be. Onreleasing the key 'che several parts will resume the positionrepresented at c, after which the key should be turned slightly to theleft; to allow the piece c to fall into the positonrepresented ato,wlien it should be turned to the right and withdrawn, which willleave' the piece c in its normal position, ont of' reach' of the key,until released from the stub m', os represented in the drawing, fig. 1.v

Having thus fully described tho construction finllopei'a-tion of mylook, what I olnim as now, and desire to secure by Letters Potent, is- Yll. The vibrating dog 01j piece c, pivotod or hinged to the bolt-plotefor the purrpose of retract-ing the same, substantially as described.

2. The combination of tlic'vibroting dog or piece c, spring-cath m, andspring-lever d, substantially as :ind operating in the manner setforili,

3. The combination of the pipestem )i with the spring G, .ooi-tying thestud m and clog e, substantially as and for the lioni'poses speoiiied.

In testimony whereof I hereunto subscribe my name lthis 2d day of May,1867. n

' NILS NARD.

'Witnesses SYDNEY E. SMITH, W; MORRIS SMITH.

